As the attack progressed, a group of white hat hackers (ethical programmers who look for security holes in software) caught on to what was happening. (gizmodo.com)
As part of bug bounty programs, companies offer cash and other rewards to security researchers or so - called white hat hackers who break into their computer systems and find security holes. (fortune.com)
They have a bug - hunting community of white hat hackers. (dazeinfo.com)